PA
G
E
10
P32/42 C
HASSIS
P32/42 Rev. 12/98
tions purchasers that the design, location and installation of any type of fuel storage sys-
tem involves significant technical and engineering considerations and that these state-
ments on gaseous fuel conversions should not be interpreted to be an approval by
General Motors of any modification to the original equipment fuel system.
Conversions to gaseous fuel should be made in conformance with applicable Federal
and State regulations. Removal of emission-control components, or the addition of gas-
eous fuel systems which could damage or reduce the longevity of those components and
could also cause the mechanical and emission performance warranty to be voided.
Exhaust System
Particular care should be taken to prevent the possibility of exhaust fumes and carbon
monoxide exposure to vehicle occupants in units completed by body builders. Holes and
openings through the floor and all other parts of the body must be permanently and ade-
quately sealed by the body builder to avoid exhaust intrusion into any occupant area.
If it is necessary to change the exhaust outlet location, the exhaust discharge must be
unobstructed and directed away from occupant areas. Alteration of the exhaust outlet
or its position may increase exhaust noise and render the vehicle illegal in those areas
with pass-by noise regulations. All vehicles >10,000 lbs. GVWR come under Federal
noise regulations, vehicles <10,000 lbs. GVWR are regulated by various state and local
regulations of the Environmental Protection Agency; see those regulations for rules, test
procedure and noise levels permitted.
Tail pipe outlet location must be tested statically and with the vehicle in motion to ensure
that exhaust gases do not penetrate side or rear windows or under body seams and
holes. Auxiliary power plants should also be tested under the same conditions. Tail pipe
extension must extend 2.0 to 2.5 in. outboard of body side panels. Tail pipe exit ahead
of rear wheels is not recommended.
Check for leaks in exhaust systems and repair as required.
Exhaust temperatures can exceed 1600
_
F under extreme operating conditions, with
pipe surface temperatures slightly less than this. Extreme care must be used when plac-
ing body components in the proximity of the exhaust system so as not to exceed the rated
temperature limits of the components. Due to variants in underbody configurations of
the vehicles, we are not in a position to make recommendations on how to insulate or
design components in the proximity of the exhaust system.
Each manufacturer must make temperature checks of critical areas of his vehicle and
adjust his design accordingly, or provide shielding to ensure safe operation of his body
components.
The same can be said for the engine compartment. Obviously there will be additional
heat radiated from the engine. How much is retained in the area will depend on how well
this area is ventilated in your individual designs. Here again, temperature checks of inte-
rior areas surrounding the engine should be made to determine if your insulation is ade-
quate. This is the same engineering practice we have followed on our complete vehicles
incorporating these exhaust systems.
Exhaust system materials are selected and tested to withstand the operating environ-
ment of the vehicle. Do not modify the exhaust system in any way. The tail pipes are
made of 409 stainless steel or aluminized 409 stainless steel.
Heat shields are mounted to the underbody and/or exhaust system components (catalyt-
ic converter and muffler). Shields for the propshaft hanger bearings are also provided
in some vehicles.
Section 9 – Steering
Check power steering fluid level and system operations. (Refer to Owner’s Manual)
Steering wheel and horn pad must not be altered or replaced.
The following statement applies to motorhome chassis only.
Steering wheel and shaft must be located and supported as shown on the body builders
drawing.
Section 10 – Tires/Wheels
Check wheel lug nuts for proper torque; specifications are provided in the Owner’s
Manual.
Substitution of tires of greater capacity than those offered as original equipment by ve-
hicle manufacturer is not approved for use on original equipment wheels. Any usage of
higher capacity tires must be accompanied by higher capacity wheels. However, the
wheel offset and distance from centerline of rim to wheel mounting face must be the
same as the replaced original equipment wheel to ensure proper wheel bearing loading
and clearance of tires to body and chassis components.
Increasing tire and wheel capacity does not necessarily increase vehicle GVW ratings.
It is recommended that tire chain clearance guideline, J683 from the Society of Automo-
tive Engineers be adhered to in designing rear wheelhouse clearance.
Check tires and inflate to recommended tire pressure according to the tire pressure infor-
mation displayed on the certification/tire label provided with the vehicle before shipment
of vehicle from Body builder.
Any substitution of tires may affect Speedometer/Odometer accuracy.
Summary of Contents for P32
Page 32: ...PAGE 32 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Auto Apply Park Brake Harness Ground...
Page 33: ...PAGE 33 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Instrument Cluster Location...
Page 35: ...PAGE 35 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Chassis Data...
Page 36: ...PAGE 36 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Taperleaf Suspension...
Page 37: ...PAGE 37 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Gas Engine 5 7L V8 Option L31...
Page 38: ...PAGE 38 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Gas Engine 4 3L V6 Option L35...
Page 39: ...PAGE 39 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Gas Engine 7 4L V8 Option L29...
Page 40: ...PAGE 40 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Diesel Engine 6 5L Turbo Ho Option L65...
Page 41: ...PAGE 41 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Diesel Engine 6 5L HO Option L57...
Page 43: ...PAGE 43 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Air Conditioning Fittings...
Page 44: ...PAGE 44 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Air Conditioning Compressor Locations...
Page 45: ...PAGE 45 P32 42 CHASSIS P32 42 Rev 12 98 P 300 32 42 Fuel Filler Neck...
Page 46: ...PAGE 46 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Fuel Tank Arrangement...
Page 47: ...PAGE 47 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Temporary Fuel Tank Arrangement...
Page 48: ...PAGE 48 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Center High Mounted Stop Lamp CHMSL...
Page 49: ...PAGE 49 P32 42 CHASSIS P32 42 Rev 12 98 P 300 32 42 Lamp Mounting P 30032 P 30042...
Page 50: ...PAGE 50 P32 42 CHASSIS P32 42 Rev 12 98 P 300 32 42 Instrument Panel Cut Out...
